Messages in this thread | | | Date | Sat, 10 Sep 2016 16:30:31 +0200 | From | Borislav Petkov <> | Subject | Re: 584c5c422f6c ("x86/ioapic: Support hot-removal of IOAPICs present during boot") |
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On Sat, Sep 10, 2016 at 09:11:30PM +0800, Rui Wang wrote: > Thanks for the analysis. Looks like acpi_gbl_root_node == 0. It is
Is ACPI_HANDLE(root_bus->bridge) == ACPI_ROOT_OBJECT?
Because this is what the code does but I can't see it from the code that the handle is of type ACPI_ROOT_OBJECT...
> initialized earlier than where we call acpi_ioapic_add(). > start_kernel() > ->acpi_early_init() > ->acpi_initialize_subsystem() > ->acpi_ns_root_initialize() > -> acpi_gbl_root_node = ... > > > But acpi_gbl_root_node can be 0 if acpi_disabled == 1. > Do you somehow have acpi turned off (!CONFIG_ACPI or booting with acpi=off)?
Nope.
-- Regards/Gruss, Boris.
ECO tip #101: Trim your mails when you reply.
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